Couch-roll.



l No. 694,954. a lPatented Maa- Il; 190.2.

-B FARNHAM. UUCH BULL.

(Application and sept. no, 1901,)

80 Model.)

no ...on o.. oo on... r. .c

no o one." n ...sono of...

El ms (m5.

me Noem: Farms wl. Puma-umm wAsHmcrroN. u. c,

UNrrnD STATES' PATENT OFFICE. f

BION B. FARNHAM, OF CASTLETON, NEW YORK. i,

COUCHlROLL.

SPECIFICATION forming part of Letters Patent No. 694,955, dated March 11, 1962.

Application filed September 20, i901. Serial No. 75,943. (No model.) i

To all whom it may concern.-

Be it known that LBION B. FARNHAM, a citizen of the United States, residing at Castleton, Rensselaer county, New York, have invented certain new and useful Improvements inl Couch-Rolls; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the gures of reference marked thereon ,which form a part of this specification.

My invention relates to Arolls for paper-machines known to the trade as couch-rolls.7

In the drawings, Figure l'shows a sectional view of three rollers in series'with a couchroll; Fig. 2, a longitudinal sectional view ofV one of my improved conch-rolls; Fig. 3, asimilar view of still another form thereof; Fig. 4, an absorbent washershown in plan, and Fig.

.5 an elevation of one of thebundles of fiber eration, when it is soft and of uniform density, it works very well; butas soon as a few days or weeks use have been given it it becomes lumpy or ridges form in it, and these lumps or ridges make aA corresponding depression in the forming sheet of paper which itis impossible to remove, and the sheetis therefore spoiled and wasted. When this occu rs, there is no remedy except to discard the couch-roll and insert anew one. This is not only an expensive operation, but the whole machine must bestopped and all paper-making cease while the new roll is being set and adj usted, entailing a considerable loss. The manner lin which a couch-roll performs its functions is that itpresses upon the paper as it rolls, absorbing considerable of the water from the paper-pulp, and prevents the water not absorbed from passing nnderthel conchroll, thus delivering the paper at a point beyond the couch-roll in a drier and more compressed condition than-before it was acted upon by it.

My improvement provides a better waterabsorber and a roll that Will not work into lumps and ridges, but will always maintain agperf'ectly even surface, while it will absorb vastly more of the water than any other style of roll known to me.

My roll 1 is composed of washers made of any material having the fiber diverging from the center outward or at least standing practically on end, as seen at l in all the figures.

lWhen I make the washers of a piece of especially-prepared felt, I cut them out circular inform and make an opening in the middle, so they will slip on the spindle, and preferably tack them in position, as seen at 8 in Fig. 2. It will be seen at l in Figs. l and 2 that the hair, wool, or iiber rises or projects at right angles t9 the spindle, or, in other words, practically stands on end, and this is done for two main reasons-viz., that the full capillary capacity of the hairs, Wool, or lfiber may be given full opportunity to act and also to make a maten the surface of the brush or roll that has entire uniformity over the entire surface and which will not form intoridges or lumps, such forming into ridges and lumps being called backing up of the material of the roll. In the ordinary rolls now in use this backing `up forms ridges and lumps and soon becomes permanent or acquires a permanent set and cannot be remedied except by discarding the old and inserting a new roll.

In Figs. l and 2 I show a roll made for use where the amount of 'water to be absorbed is not great, and it answers admirably for such positions.

whole, as seen at G in Fig. 4. When this form ot' roll absorbs water, it does so with great readiness, the material soon beeomingsoaked beyond the retaining capacity of the material, when it is squeezed inward and through the perforations 9 and iiows out at the end of the roll, as seen at 7, this waste Water being conducted back again to the original poolor supply,if desired. Practice has proven that my form of roll herein shown and described Will operate indefinitely and never spoil thepaper or otherwise damage it. A

Having described my invention, what I claim, and desire to secure by Letters Patent, is-

1. Acouch-rollfor use in paper-making and other purposes consisting of a drum or journal; rings or washers of capilliform material set upon the same side by side in unbroken contact with each other and with the drum or journal and arranged so that the capillaries practically stand on end and radiate from the drurn or journal and so as to form a practically un'brokensmooth surface at the periphery of the roll substantially as described.

2. A couch-roll consisting of a perforated and hollow spindle, its outer surface being covered by an absorbent material arranged so that any surplus Water absorbed will enter the hollow spindle and be discharged therefrom substantially as described.

3. Material for the covering of couch-rollers formed by forming the capillaries or ber of which it is'composed into tufts and binding the tufts into sheets, the tufts radiating from a practically common center substantially as described.

In testimony whereof I aflix my signature in presence of two Witnesses.

BIoN B. FARNHAM.

Witnesses:

JAMES M. BROWN, A. M. TURNER. 

